// Copyright 2025 RisingWave Labs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use risingwave_common::types::Fields;
use risingwave_frontend_macro::system_catalog;

/// The view `pg_views` provides access to useful information about each view in the database.
/// Ref: [`https://www.postgresql.org/docs/current/view-pg-views.html`]
#[system_catalog(
    view,
    "pg_catalog.pg_views",
    "SELECT s.name AS schemaname,
            v.name AS viewname,
            pg_catalog.pg_get_userbyid(v.owner) AS viewowner,
            v.definition AS definition
        FROM rw_catalog.rw_views v
        JOIN rw_catalog.rw_schemas s
        ON v.schema_id = s.id"
)]
#[derive(Fields)]
struct PgView {
    schemaname: String,
    viewname: String,
    viewowner: String,
    definition: String,
}
